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Effect of heavy interstitials on anelastic properties of Nb-1.0 wt% Zr alloys

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Abstract

The mechanical properties of metals with bcc structure, such as niobium and its alloys, have changed significantly with the introduction of heavy interstitial elements. These interstitial elements (nitrogen, for example), present in the alloy, occupy octahedral sites and constitute an elastic dipole of tetragonal symmetry and might produce anelastic relaxation. This article presents the effect of nitrogen on the anelastic properties of Nb-1.0 wt% Zr alloys, measured by means of mechanical spectroscopy using a torsion pendulum. The results showed complex anelastic relaxation structures, which were resolved into their constituent peaks, representing each relaxation process. These processes are due to stress-induced ordering of the interstitial elements around the niobium and zirconium of the alloy.

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Acknowledegements

The authors wish to thank Prof. Dr. Durval Rodrigues Júnior (USP-EEL) for the samples, the Universidade Estadual de Mato Grosso do Sul (UEMS) and the Brazilian CNPq and FAPESP agencies for their financial support.

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Authors and Affiliations

  1. UNESP, Grupo de Relaxações Anelásticas, Bauru, SP, 17033-360, Brazil

    Armando Cirilo de Souza & Carlos Roberto Grandini

  2. UEMS, Rodovia Dourados/Itahum Km 12, Dourados, MS, 79804-970, Brazil

    Armando Cirilo de Souza

  3. Departamento de Física, UFSCar, Rodovia Washington Luís, Km 235, São Carlos, SP, 13565-905, Brazil

    Odila Florêncio

Authors
  1. Armando Cirilo de Souza
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  2. Carlos Roberto Grandini
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  3. Odila Florêncio
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Corresponding author

Correspondence to Carlos Roberto Grandini.

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de Souza, A.C., Grandini, C.R. & Florêncio, O. Effect of heavy interstitials on anelastic properties of Nb-1.0 wt% Zr alloys. J Mater Sci 43, 1593–1598 (2008). https://doi.org/10.1007/s10853-007-2324-0

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  • DOI: https://doi.org/10.1007/s10853-007-2324-0

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